public async void Retrieve()
        {
            var retrieveResult = await _metadataClient.Retrieve();

            Assert.IsNotNull(retrieveResult);
            Assert.IsNotNull(retrieveResult.Done);
            Assert.IsNotNull(retrieveResult.Id);
            Assert.IsNotNull(retrieveResult.State);
            Assert.AreEqual(retrieveResult.Done, false);
            Assert.AreEqual(retrieveResult.State, "Queued");
        }